<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title></title>
    <script type="text/javascript">
        var o = {};

        o['aaa'] = '111';
        o['bbb'] = '222';

        alert(o);

        var o2 = [['a1','b1'],['a2','b2']];
        alert(o2.length)



    </script>
</head>
<body>

</body>
</html>